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-rw-r--r--drivers/s390/scsi/zfcp_qdio.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c
index d3d110a04884..e78d65bd46b1 100644
--- a/drivers/s390/scsi/zfcp_qdio.c
+++ b/drivers/s390/scsi/zfcp_qdio.c
@@ -260,17 +260,20 @@ int zfcp_qdio_send(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req)
zfcp_qdio_account(qdio);
spin_unlock(&qdio->stat_lock);
+ atomic_sub(sbal_number, &qdio->req_q_free);
+
retval = do_QDIO(qdio->adapter->ccw_device, QDIO_FLAG_SYNC_OUTPUT, 0,
q_req->sbal_first, sbal_number);
if (unlikely(retval)) {
+ /* Failed to submit the IO, roll back our modifications. */
+ atomic_add(sbal_number, &qdio->req_q_free);
zfcp_qdio_zero_sbals(qdio->req_q, q_req->sbal_first,
sbal_number);
return retval;
}
/* account for transferred buffers */
- atomic_sub(sbal_number, &qdio->req_q_free);
qdio->req_q_idx += sbal_number;
qdio->req_q_idx %= QDIO_MAX_BUFFERS_PER_Q;